Check the appropriate box below
if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

¨

Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

On February 8, 2012, Synovus Financial Corp. (the Company) entered into an Underwriting Agreement (the Underwriting
Agreement), by and among the Company and J.P. Morgan Securities LLC, as representative of the underwriters named therein (the Underwriters), pursuant to which the Company agreed to sell to the Underwriters $300,000,000 aggregate
principal amount of its 7.875% Senior Notes due 2019 (the Notes). The Notes, which were offered and sold pursuant to the Underwriting Agreement, were registered pursuant to the Companys shelf registration statement on Form S-3
(File No. 333-166300).

The Underwriting Agreement contains customary representations, warranties and covenants of the
Company, conditions to closing, indemnification obligations of the Company and the Underwriters, and termination and other customary provisions.

On February 13, 2012, the Company and The Bank of New York Mellon Trust Company, N.A., as trustee (the Trustee) entered into a senior indenture (the Indenture), pursuant to
which the Notes were issued.

The Notes bear interest at 7.875% per annum. Interest is payable on February 15 and
August 15 of each year beginning August 15, 2012, until the maturity date of February 15, 2019. The Company may redeem the Notes, in whole or in part, at any time at the applicable redemption price.

The Indenture restricts the ability of the Company to issue, sell or otherwise dispose of any voting shares of any principal subsidiary
bank, to permit the merger or consolidation of any principal subsidiary bank with another corporation and to permit the sale or disposition of all or substantially all of the assets of a principal subsidiary bank. The Indenture also restricts the
ability of the Company to consolidate, merge or transfer all or substantially all of its assets.

The foregoing description of
the Underwriting Agreement, the Indenture and the Notes does not purport to be complete and is qualified in its entirety by reference to the full text of the documents which are attached as Exhibits 1.1, 4.1 and 4.2, respectively, to this Current
Report on Form 8-K and each incorporated by reference herein.

Item 8.01 Other Events

On February 8, 2012, Synovus Financial Corp. priced the public offering of $300 million aggregate principal amount of the Notes.

A copy of the opinion of Alana L. Griffin, Deputy General Counsel to the Company, relating to the legality of the Notes is
filed as Exhibit 5.1 hereto.

2

Item 9.01 Financial Statements and Exhibits

(d) Exhibits

ExhibitNo.

Description of Exhibit

1.1

Underwriting Agreement dated February 8, 2012 between the Company and J.P. Morgan Securities LLC, as representative of the several underwriters named in the agreement, pertaining to
the offer and sale of the Notes.

4.1

Senior Notes Indenture, dated as of February 13, 2012, among Synovus Financial Corp. and The Bank of New York Mellon Trust Company, N.A., as Trustee.

4.2

Form of Note

5.1

Opinion of Alana L. Griffin, Deputy General Counsel of the Company, as to the validity of the Notes.